The expedition had laid out a comfortable camp near the Indian village of the Mandan tribe, with whom peaceful relations had been established at the time of their first arrival in the neighborhood. Some of the bolder spirits had ventured into the realm of natural wonders now known as Yellowstone Park, and had viewed with amazement and awe the strange geysers that spouted hot water hundreds of feet in the air at stated periods, as well as many other singular mysteries. Dick and Roger had been among the fortunate few to view these marvels; but, as a rule, the soldiers and bordermen associated with the two captains were almost as superstitious as the ignorant red men, and actually feared to set eyes on these strange freaks of Nature which they could not understand. The Indians called the place the Bad Lands, and believed an evil Manitou dwelt there, who was ever ready to seize upon and enchain those reckless warriors who should invade his territory. Slowly the long winter had passed away, and all seemed to be going well. There had been occasional signs of trouble, when hostile hunting parties of Indians were encountered; but, thus far, none of the expedition had been more than wounded in these frays. Spring was at last at hand, and every one in the party looked forward with eagerness to the fresh start that was soon to be made. They had gathered much information concerning the vast stretch of plains and mountains that still lay between them and their goal; but, since only Indians had ever penetrated that wilderness, these stories were invariably untrustworthy, for the mind of the red man was very much like that of a child, and could see things only from an imaginative standpoint. About all that the adventurers really knew was that there was a tremendous barrier of mountains which they must climb before they could hope to attain their ambitious aim and gaze upon the Pacific Ocean, seen at that time only by those, following Balboa, who had crossed the narrow isthmus where the Panama Canal now joins the rival oceans. Every evening, when the sun was setting in a maze of glowing colors, Dick and Roger were accustomed to stand and watch until the last fiery finger had finally faded from the skies. To them that mysterious West held out beckoning arms. They never tired of talking about the fresh wonders they might gaze upon once they started into the trackless wilds; and their young souls were aflame with eagerness as the days crept along, each one bringing them closer to the hour of departure. For some time they had intended to take a canoe through the big rapids of the river, which they had passed in ascending the stream, before making the winter camp. From the Indians they had secured all possible information, and finally, knowing that their time here was now short, they had set forth with the canoe that had been their property for months, bent upon undertaking the rather risky voyage.